| 摘要 |
A self-regulated pressure control valve arrangement comprises a pressure control valve 50 and a pressure setting unit 58 for setting a set pressure. The position of the pressure regulating element (8, Fig. 1) of the valve 50 is controlled on the basis of the predetermined functional relation between the position of the pressure regulating element (8) and the controlled pressure. Feedback may be provided from a position sensor 20 and/or a pressure detector 54. The predetermined functional relation may be stored e.g. in the form of a look-up table in a computer of a control unit 56. The valve is adjusted and the values stored in the look-up table updated if the duration between the pressure set and the pressure detected exceeds a threshold. <IMAGE>
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